Clevis



k P. 0. BURKE.

CLEVIS.

APPLICATION FILED JAN-20,1919- 1 ,333,962. Patented Mar. 16, 1920.

MEI/r00 P112572 ZZ FUR/(z UNITED STATES PATENT OFFICE.

PETER D. BURKE, OF MITCHELL, SOUTH DAKOTA, ASSIGNOR OF ONE-HALF '10 ROSCOE B.

' PIPER, 0F SIOUX CITY, IOWA.

CLEVIS.

Specification of Letters Patent.

Patented Mar. 16, 1920.

Application filed January 20, 1919. Serial No. 271,997.

To all whom, it may concern:

Be it known that 1, PETER D. BURKE, a citizen of the United States, and a resident of Mitchell, in the county of Davison and State of South Dakota, have invented certain new useful Improvements in Clevises, of which the following is a specification. a

The clevis presented in my U. S. Patent 1,197,008, is providedwith a clevis-pin having one end threaded into one. eye of the clevis and the other end provided with a n t-sided head adapted to be received by a correspondingly-shaped recess in the other eye the clevis, to prevent turning of the pin without springing the arms of the clevis relatively toward each other. i V

In operation of this device, it is necessary to spring the arms toward one another to re- Furthermore, the invention has for an object the production of an improved clevis which may be manufactured at a price to compete with clevise-s of the common type.

With these and other objects in view, the invention consisting in the construction, combination, and novel arrangement of parts will be fully understood from the following description, reference eing had to the accompanying drawings, which form a part of this application, and in which like charactors of reference indicate corresponding parts throughout the several views, of which Figure 1 is a side elevation of a clevis constructed in accordance with the invention, one eye thereof being cut away;

Fig. 2 is a plan of the same;

Fig. 3 is an end elevation of the same; and

Fig. i is an inverted plan of the clevispin.

Althoug i have illustrated and hereinafter described the preferred form of the invention, I would not be understood as being limited to the specific structure chosen for illustration for various alterations and modifications may be made in the details of construction and arrangement of parts, without departing from the spirit and scope of the invention as defined in the appended claims.

Referring, now, to the illustrations, the clevis consists of a how, 5, having arms, 6 and 7. The bow is of resilient metal where by the arms will yield toward o1'from each other; and is preferably cast.

The clevis-pin, 10, is freely encircled by the eye, 8, and threaded into the eye, 9. The pin is provided with a thumb-grip, l1; and with one or more radial projections, 12.

The outer face of the eye,8, is provided with an ear, 13, extending longitudinally of 1 the axis of the eye and engageable by the projection, or projections, 12 to prevent rotation of the pin. The said earis preferably in the form of a segment positioned adjacent the perimeter of the eye and having its edge inclined, as at 14, to the face of the eye, as illustrated. 7

By virtue of this construction, it is evident the pin may be screwed into the eye,

until the projections engage the apex of the ear, and upon continuing rotation of the pm, the arms are intermittently sprung toward each other as the pro ections successively engage and pass over the ear.

The ear and projections are preferably so constructed and related, that to turn the pin sufliciently to bring the ears into engagement with the face of the eye, or to unturn the pin from such position, a great deal of power must be applied to turn the pin, or the arms held sprung toward each other during a few turns of the pin. However, the pin is secure against accidental displacement, if rotated until engagement of the ear and projections requires abnormal rotating power.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is,-

1. A clevis comprising a bow having yieldable arms, provided with eyes at their ends, a clevis-pin, freely encircled by one of the eyes and threaded into the other eye, radial projecting means on the pin adjaand an car on said face extending longi- "tudinally of the axis of the eye, positioned --:adjacent thejperimeter of the eye, and

adapted for engagement by said :means whereby rotation ofthe pin is normally prevented without relative movement lee-- tween'the arms. r

3. A clevis comprising 7 a bow having yieldable arms provided with eyes, a clevisp'in'freely encircled by one of the eyes and threaded into the other eye, radial project- Iingmeans on the pin adjacentjthe outer face of said first eye, and an car on said face extending longitudinally of the. axis of "the eye engageable by said means to prevent :rotation of the pin without relative movement' betweenvthe' arms, said ear and means being so constructed and related .a's'to coact to force the arms toward each other when abnormal power isapplied to rotate the pin. '4. A clevis comprising a bow having yieldable armsprovided with eyes, a clevispin freely encircled by one of the eyes and threaded into the other eye, radial projecting means on' thepinzadj aeent the outer face of said first eye, and an ear on said face extending longitudinally .of .the axis of the eyeandengageable by said means to prevent rotation of the pin without relative movement between the arms, the edge of said ear being inclined toward said face to coact with said means to force the arms toward each other when suflicient rotating power is applied to the pin.

5. A clevis comprising a bow having yieldable arms provided "with eyes at their ends, a clevis pin freely encircled by one of the eyes and threaded into the other eye, and projecting means on the pin and on one of the arms adapted to contact with and pass one-another asthe pin is screwed into the threaded 'eye,"'but to 'engageone another to prevent a rotation of the pin except by the application of substantial power, when said pin is. screwed well into said eye.

6. A 'clevis comprising a'bow having arms provided with eyes at their ends, a clevis pin'freely encircled by'oneof thexeyes and threaded into the other eye, and means on 'the pin and on one ;of' the arms adapted to contact with and pass one another as the pin is screwed into the threaded eye, but'to engage one another to "preventa rotation ofthepinexcept by the application of substantial power, when said pin is screwed well into said eye.

In testimony whereof Thave' hereunto set my'hand,'this 9th day of'January, 1919.

' 5 PETER D. BURKE. 

